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European Food Research and Technology

, Volume 230, Issue 5, pp 785–796 | Cite as

Is recycled newspaper suitable for food contact materials? Technical grade mineral oils from printing inks

  • Maurus Biedermann
  • Koni Grob
Original Paper

Abstract

Recycled paper and board used in food packaging materials (boxes, paper bags) often cause migration of mineral oil into food at levels which are unacceptable according to present toxicological assessments. When foods in recycled board are densely packed into larger boxes or onto pallets, most of the hydrocarbons up to n-C20 may migrate into the packed food within a few weeks, those up to n-C28 at a decreasing rate. Unprinted recycled board contained 300–1,000 mg/kg mineral oil <n-C28. The main sources are the inks used for printing newspapers: newspapers contained roughly 3,000 mg/kg mineral oil <n-C28. These mineral oils fall into classes for which JECFA established a tolerable daily intake of 0.01 mg/kg body weight. Using standard assumptions for calculating specific migration limits, a maximum tolerable concentration in food of 0.6 mg/kg is derived. This evaluation assumes highly refined white oils, whereas the oils found in recycled board are of technical quality and contain 15–25% aromatic compounds, predominantly with 1–3 aromatic rings, as shown by comprehensive GC × GC. This finding precipitates authorities into a dilemma: recycling is supported for the sustainable use of materials, but on the basis of present toxicological assessments the migration is often far beyond acceptable.

Keywords

Recycled paper and board Printing ink Migration from cardboard Mineral oil saturated hydrocarbons (MOSH) Mineral oil aromatic hydrocarbons (MOAH) 

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Official Food Control Authority of the Canton of ZürichZurichSwitzerland

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